Heating & cooling problem

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TomServo92

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Yesterday, my '02 LS V8 started blowing hot air on the passenger side. Driver's side still blows ice cold. After fiddling with it, I found that if I move the temp to full heat (90) for a few seconds and then down to full cool (60) for a few seconds and then set it around 70, it will cool for awhile. Then it will begin to start blowing hot again on the passenger side. I suspect the DCCV but I wanted to run it past the forum to see if I'm on the right track before spending the money and time to replace it.
 
Dccv

DCCV, On my first failure I took out the DCCV cleaned it inside and out but put a new one in its place. Everything checked out ok on the old one. Use an ohm meter on the connector at the fan shroud, check the left two pins with the lower right pin. you should read 10-23 ohms. if ok, then DCCV ok, probably just gummed up.
So the second time mine failed, i removed it, found the one solenoid shaft gummed up, so I cleaned it inside and out, made sure the shafts worked smoothly, reinstalled and it has been working great ever since. I have a report with pictures with a breakdown of the DCCV w/explanations of the problem, send me your email address if you want it.
 
OK, I got the DCCV from Amazon.com (of all places!) for $130. With overnight shipping it came to $146. Not a bad price. I decided to put in fresh coolant while I'm at it. Hopefully this won't be a tough job.

Tireman - thanks for all the info. I decided to replace this time and I'll take the old one apart. If this happens again, I'll probably just clean it.
 
Pita

The job is a PITA, you must remove the entire bracket 2 bolts. the hose clamps are a pain also. remove the two front hoses at the water pump, it's easier. The 3 rear hoses, just pull them off at the clamps, replace clamps with worm drive. if you have the ford clamp tool it may be easier to work on. so you'll pull the entire unit bracket and two front hoses all at once. I also took a water hose and put it into the heater core lines and flushed it out good to remove an sediment.
 
tireman said:
The job is a PITA, you must remove the entire bracket 2 bolts. the hose clamps are a pain also. remove the two front hoses at the water pump, it's easier. The 3 rear hoses, just pull them off at the clamps, replace clamps with worm drive. if you have the ford clamp tool it may be easier to work on. so you'll pull the entire unit bracket and two front hoses all at once. I also took a water hose and put it into the heater core lines and flushed it out good to remove an sediment.
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It can't be any worse than replacing the crankshaft position sensor on my old '95 Taurus SHO.
 
rainjacks said:
Yeah, that had to be a serious pita. As I recall there wasn't much room under the hood on those cars.
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You had to take out the fenderwell to get to it. But the hardest part was removing the crank pulley. Even with a puller it was a PITA.
 
Son of a bitch! The DCCV arrived today and it was damaged. One of the hose connections was broken off. I did the Amazon RMA and they're cross-shipping a new one but it won't be here until Tuesday. I guess I'll be working on the LS next weekend instead.
 
TomServo92 said:
Son of a bitch! The DCCV arrived today and it was damaged. One of the hose connections was broken off. I did the Amazon RMA and they're cross-shipping a new one but it won't be here until Tuesday. I guess I'll be working on the LS next weekend instead.
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Same here. I ordered a bunch of new suspension parts and was planning to install this weekend, one of the shipments was delayed a day so it wont be here till next week. Next weekend will be the one :]
 
tip

before you put the hoses on the DCCV, lube them up on the inside with a little soapy dishwater, it slicks up the rubber so it goes on quick and does not leave any residue or damage the hose like an oil base lubricant.
 
tireman said:
before you put the hoses on the DCCV, lube them up on the inside with a little soapy dishwater, it slicks up the rubber so it goes on quick and does not leave any residue or damage the hose like an oil base lubricant.
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Thanks for the tip.

The new (and undamaged) DCCV arrived so I'll be attempting the repair this weekend (weather permitting).
 
TomServo92 said:
Thanks for the tip.

The new (and undamaged) DCCV arrived so I'll be attempting the repair this weekend (weather permitting).
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For some unknown reason, I picture a small group sitting in your garage making snide remarks while you change out the valve...
 
joegr said:
For some unknown reason, I picture a small group sitting in your garage making snide remarks while you change out the valve...
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LOL...not likely. I tend to have a short temper when working on cars. My friends and family tend to steer clear if possible. It's kind of like the Hulk: "Don't make me angry. You won't like me when I'm angry".
 
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